Product Description
Direct replacement hydraulic cylinder seal kit designed for main lift cylinders on Raymond 7420 and 7440 series forklifts. This complete sealing solution includes NBR seals, PTFE backup rings, wipers, and O-rings to prevent internal and external leakage. Compatible with 2.5 inch bore cylinders and 1.25 inch rod diameter, rated for pressures up to 3000 PSI. Ideal for warehouse and industrial lifting applications requiring reliable, long-lasting cylinder performance.
Specifications
Dimensional
| Bore Diameter | 2.5 inch |
| Rod Diameter | 1.25 inch |
| Seal Cross-Section Thickness | 0.250 inch (nominal) for main seal |
Hydraulic/Pneumatic
| Seal Kit Application | Main lift cylinder seal replacement for Raymond 7420 and 7440 series |
| System Pressure Rating | Rated for lift cylinder operating pressure up to 3000 PSI |
| Seal Material | Nitrile rubber (NBR) with PTFE backup rings |
Material & Construction
| Seal Hardness | 70 Shore A for primary seals |
| Backup Ring Material | PTFE per ASTM D4894 |
Part Numbers & Compatibility
| Part Number | 1075590/01 |
| Compatible Equipment Models | Raymond 7420, Raymond 7440 |
| Kit Contents | NBR seals, PTFE backup rings, wiper seals, O-rings |
Frequently Asked Questions
Q: What equipment does the 1075590/01 hydraulic cylinder seal kit fit?
A: The 1075590/01 is designed for Raymond 7420 and 7440 series main lift cylinders with a 2.5 inch bore and 1.25 inch rod diameter. This kit is specifically engineered for the primary lift function cylinders on these models.
Q: What pressure rating is this seal kit rated for?
A: This seal kit is rated for system pressures up to 3000 PSI. This rating ensures safe operation under the full load range of Raymond 7420 and 7440 lift trucks. Do not exceed the rated pressure as seal integrity may be compromised.
Q: What components are included in this kit?
A: The kit includes NBR primary seals, PTFE backup rings, wiper seals, and O-rings for complete hydraulic cylinder sealing. All components are designed to work together to prevent internal and external leakage across the piston rod seal, main piston seal, and end cap seals.
Q: How do I know when this seal kit is needed?
A: Replace the seal kit if you observe hydraulic fluid leaking from the cylinder rod, loss of lift pressure or speed, inability to hold load, or low hydraulic fluid levels. A failed seal allows contamination and loss of lift function, requiring prompt seal replacement.
Q: How do the seal materials perform in Raymond 7420 and 7440 lift cylinders?
A: NBR seals provide excellent resistance to hydraulic oils and operate reliably across standard warehouse temperature ranges. PTFE backup rings prevent seal extrusion under 3000 PSI pressure cycling. Wiper seals exclude dust and contamination from entering the cylinder bore, extending seal life and system cleanliness.
Q: What is the expected service life of this seal kit?
A: Seal kit lifespan depends on operating conditions, pressure cycling frequency, and hydraulic fluid quality. Regular fluid maintenance and inspection can extend performance. Replace seals when leakage occurs or preventively during scheduled maintenance cycles.
Q: Can this seal kit be used for other Raymond models?
A: This seal kit is specifically designed for Raymond 7420 and 7440 series cylinders with the specified bore and rod dimensions. Use only for these models to ensure proper fit, pressure rating, and performance.